Has anyone ever heard of the piece of glass above the front seats cracking as a result of being tinted? My tint guy has 30 years experience and says he never tints sunroofs because they can break and he won't accept liability for it. from what I can gather reading the forums the past several months this doesn't seem to be a problem for anyone. I don't see the difference between the "sunroof" and the giant piece of glass in the back except for it has the iridescent color being discussed in another thread. Appreciate any feedback...